diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp
index 9983741..c322646 100644
--- a/lib/Basic/SourceManager.cpp
+++ b/lib/Basic/SourceManager.cpp
@@ -708,7 +708,7 @@
       unsigned MarkerLineNo = getLineNumber(LocInfo.first, Entry->FileOffset);
       LineNo = Entry->LineNo + (LineNo-MarkerLineNo-1);
       
-
+      // Note that column numbers are not molested by line markers.
     }
   }